Expansion tank for a cooling system, as well as a cooling system for an electric traction machine for a motor vehicle

Abstract

An expansion tank for a cooling system includes at least one inlet for a coolant oil, a first outlet for the coolant oil, a second outlet for a gas, and a connecting channel between the at least one inlet and the first and second outlets. By a horizontal offset, one of the inlets for the coolant oil and the second outlet for a gas are always arranged above the first outlet for the coolant oil in an installation situation in any operating state. A filter medium for removing particles and/or water from the coolant oil is provided between the at least one inlet and the first outlet.

1 . An expansion tank for a cooling system comprising:
 at least one inlet for a coolant oil;   a first outlet for the coolant oil;   a second outlet for a gas; and   a connecting channel between the at least one inlet and the first and second outlets,   wherein, by a horizontal offset, one of the inlets for the coolant oil and the second outlet for a gas are always arranged above the first outlet for the coolant oil in an installation situation in any operating state, and   wherein a filter medium for removing particles and/or water from the coolant oil is provided between the at least one inlet and the first outlet.   
     
     
         2 . A cooling system for an electric traction machine for a motor vehicle, comprising:
 a circuit system for conducting a coolant oil to be circulated;   a circulation pump ( 14 ) for conveying the coolant oil in the circuit system in a first circulation direction;   a motor input connection for fluidically connecting the circuit system on an input side to the electric traction machine to be temperature-controlled;   a motor output connection for fluidically connecting the circuit system on an output side to the electric traction machine to be temperature-controlled; and   a first heat exchanger for dissipating heat from and/or supplying coolant oil to be recirculated in the circuit system, and   at least one filter medium for removing particles and/or water from the coolant oil.   
     
     
         3 . The cooling system according to  claim 2 , wherein at least one of the filter media in the order of flow comprises a first filter stage and a second filter stage,
 wherein the first filter stage comprises a hydrophobically coated screen fabric, and   wherein the second filter stage comprises a binding agent for water.   
     
     
         4 . The cooling system according to  claim 2 , wherein at least one of the filter media comprises a collection tank for receiving particles and/or water. 
     
     
         5 . The cooling system according to  claim 2 , wherein at least one of the filter media in the circuit system is provided ahead of the motor input connection and behind the first heat exchanger. 
     
     
         6 . The cooling system according to  claim 2 , comprising an expansion tank, which is at least partially filled with the coolant oil to be recirculated in the circuit system, and at least partially filled with a gas. 
     
     
         7 . The cooling system according to  claim 6 , wherein at least one of the filter media is arranged in the circuit system at and/or in the expansion tank. 
     
     
         8 . The cooling system according to  claim 2 , wherein at least one of the filter media comprises a thermal drying device. 
     
     
         9 . A thermal management module for a powertrain of a motor vehicle, comprising:
 for a transmission, an oil circuit having a second circulation direction and having a second heat exchanger;   for at least one vehicle component, a water circuit having a third circulation direction and having a third heat exchanger; and   for an electric traction machine, the cooling system according to  claim 2 .   
     
     
         10 . The thermal management module according to  claim 9 , wherein the water circuit is connected with the first heat exchanger ( 18 ) of the cooling system ( 2 ) for an electric traction machine for heat transfer. 
     
     
         11 . The cooling system according to  claim 7 , wherein the at least one of the filter media arranged in the circuit system is arranged behind the motor output connection. 
     
     
         12 . The thermal management module according to  claim 9 , wherein a pulse inverter for the electric traction machine is arranged in the water circuit. 
     
     
         13 . The thermal management module according to  claim 10 , wherein the water circuit is connected to the environment as a sole fluid bound heat transfer of the cooling system. 
     
     
         14 . The thermal management module according to  claim 10 , wherein in the third circulation direction, a pulse inverter for an electric traction machine is arranged upstream of the first heat exchanger.